Grain-drying machine



- T. H. McQULLOCH.

Grain Drying Device.

Patnted April 17, 1860.

i No. 27,917.

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j/ifiwfuw w UNITED STATES PATENT OFFICE. I

T. H. MCCULLOCH, OE PEOBIA, ILLINOIS.

GRAIN-DRYING MACHINE.

Specification of Letters Patent No. 27,917, dated April 17,, 1860.

To all whom it may concern:

Be it known that I, T. H. MoCULLooH, of Peoria, in the county of Peoriaand State of Illinois, have invented a new and Improved Grain Drying andEvaporating Apparatus; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe annexed drawings, making a part of this specification, in which-Figure l, is a longitudinal central section of my invention. Fig. 2, atransverse vertical section of ditto.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists in the employment or use of a series of tubesand a conical chamber placed within a rotating inclined shell, andarranged substantially as hereinafter shown, whereby the article orsubstance to be dried or acted upon by heat, is within a limited space,and consequently by a' very compact device, subjected to a great heatingsurface, and the desired work efliciently and expeditiously performed.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A represents a hollow, cylinder, or shell, provided with a hollow shaftor axis B, having a partition or plug a, at its center to prevent adirect communication through it, see Fig. 1. The shaft B, is fitted inbearings at the upper ends of uprights b, b, one of which is a triflehigher than the other, to give the shaft and cylinder a slight-1yinclined position as shown in Fig. 1.

Within the cylinder A, and all around its inner surface there areattached tubes C, said tubes extending the whole length of the cylinder,and closed at one end by the head 5*, but are open at the opposite endsthe head 0, being perforated as shown at (Z, Fig. 1. Within the cylinderA, there is also placed a conical chamber D. This chamber extends thewhole length of the cylinder, and its larger end is closed by thecylinder head 6", but the smaller end projects through the head 0, aspace 6, being allowed between the shaft B, and the end of the chamber.The chamber D, is concentric with shaft B. The interior of the chamberD, communicates at its larger end with the tubes C, by means of smalltubes f, which project a certain distance within the tubes C, as shownin Fig. 1.

Between the tubes 0, and the chamber D,

there is a space or chamber E, which communicates with the shaft B, nearone end by tubes 9, the space E, communicatmg near its opposite end withthe shaft B, by a tube h, i

the plug or partition a, being between the tubes g, h.

The operation is as follows: The cylinder A, is rotated by anyconvenient power and steam or hot air passes into the shaft B, andthrough the tubes 9, g, into the space E, and from space E, through tubeIt, out through the opposite end of shaft B, as indicated by the blackarrows 1. The grain or other substance to be dried or acted upon by theheat, is passed into the smaller end of the chamber -D, and inconsequence of the conical form of said chamber passes toward its largerend and through the tubes f, into the tubes C, the grain or othersubstance in consequence of the slightly inclined position of thecylinder A, passes toward the openings cl, of the tubes C, through whichit is discharged, perfectly dried or freed from moisture, in consequenceof passing over the heated surfaces of the chamber D, and tubes C, thesmall tubes f, extend a certain distance into the tubes G, to preventthe grain or substance passing back into the chamber D, by the rotationof the cylinder,

the rotation causing the grain or other substance to pass through allthe tubes C, and causing a large quantity of the same to be dried veryexpeditiously and in a thorough manner.

In case steam is employed to heat the chamber D, and tubes C, it wouldbe requisite to have some means to carry off the water of condensation,and to this end I connect two of the tubes C, by a plate 2', which formsa lifting chamber j, spaces 70, being allowed between the outer part ofone of said tubes 0, and the inner side of the cylinder A, to allow thewater of condensation to pass into said chamber as it passes underneaththe shaft B, the chamber j, has a tube Z, communicating with it, and thedischarge end of the shaft B, to allow the water of condensation to passout as the chamber j, passes over shaft B, see arrows 2 Figs. 1 and 2.

This device will answer extremely well for evaporating the moisture fromsugar and other substances, and in fact may be generally applied in allcases for drying and evaporating the moisture from substances which canbe passed through it.

Having thus described my invention what the plate 2', connecting twotubes C, to form a Water-lifting chamber j, and the tube Z, to form acommunication between said chamber j, and the shaft B, as and for thepurpose specified.

T. H. MOOULLOCH.

Witnesses:

DAvm MOCULLOGH, JOHN B. LAWRENCE.

